I don't believe it knows all about me, darlin.I bet Google didn't know (until now) what a fantastic cook I am. Or how my face lights up with joy (yes, I said joy) over the simplest of things at times.
Google's ability to understand patterns from the micromoves of every individual (our digital footprints) is what makes them a formidable competitor in many industries. They could emerge as the one who knows more about customers than anyone else: it is simultaneously scary and interesting in terms of the potential services.
It would be interesting to reveal to each user what information has gathered about him.
I just finished brushing my teeth. I wonder if google saw me dental flossing as well? Cached me?